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b863097016
2007-07-02 Matthias Clasen <mclasen@redhat.com>
* gdk-pixbuf.c (gdk_pixbuf_get_option): Document the
"orientation" option.
* gdk-pixbuf.symbols:
* gdk-pixbuf-core.h:
* gdk-pixbuf-util.c (gdk_pixbuf_apply_embedded_orientation):
New function to handle Exif orientation information in
tiff and jpeg images. (#439567, Michael Chudobiak)
svn path=/trunk/; revision=18340
245 lines
8.2 KiB
C
245 lines
8.2 KiB
C
/* GdkPixbuf library - GdkPixbuf data structure
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*
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* Copyright (C) 2003 The Free Software Foundation
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*
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* Authors: Mark Crichton <crichton@gimp.org>
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* Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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* Havoc Pennington <hp@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef GDK_PIXBUF_CORE_H
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#define GDK_PIXBUF_CORE_H
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#include <glib.h>
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#include <glib-object.h>
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G_BEGIN_DECLS
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/* Alpha compositing mode */
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typedef enum
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{
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GDK_PIXBUF_ALPHA_BILEVEL,
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GDK_PIXBUF_ALPHA_FULL
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} GdkPixbufAlphaMode;
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/* Color spaces; right now only RGB is supported.
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* Note that these values are encoded in inline pixbufs
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* as ints, so don't reorder them
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*/
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typedef enum {
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GDK_COLORSPACE_RGB
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} GdkColorspace;
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/* All of these are opaque structures */
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typedef struct _GdkPixbuf GdkPixbuf;
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#define GDK_TYPE_PIXBUF (gdk_pixbuf_get_type ())
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#define GDK_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_PIXBUF, GdkPixbuf))
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#define GDK_IS_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_PIXBUF))
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/* Handler that must free the pixel array */
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typedef void (* GdkPixbufDestroyNotify) (guchar *pixels, gpointer data);
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#define GDK_PIXBUF_ERROR gdk_pixbuf_error_quark ()
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typedef enum {
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/* image data hosed */
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GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
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/* no mem to load image */
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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/* bad option passed to save routine */
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GDK_PIXBUF_ERROR_BAD_OPTION,
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/* unsupported image type (sort of an ENOSYS) */
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GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
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/* unsupported operation (load, save) for image type */
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GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
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GDK_PIXBUF_ERROR_FAILED
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} GdkPixbufError;
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GQuark gdk_pixbuf_error_quark (void);
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GType gdk_pixbuf_get_type (void) G_GNUC_CONST;
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/* Reference counting */
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#ifndef GDK_PIXBUF_DISABLE_DEPRECATED
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GdkPixbuf *gdk_pixbuf_ref (GdkPixbuf *pixbuf);
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void gdk_pixbuf_unref (GdkPixbuf *pixbuf);
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#endif
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/* GdkPixbuf accessors */
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GdkColorspace gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf);
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gboolean gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf);
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guchar *gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_width (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_height (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf);
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/* Create a blank pixbuf with an optimal rowstride and a new buffer */
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GdkPixbuf *gdk_pixbuf_new (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample,
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int width, int height);
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/* Copy a pixbuf */
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GdkPixbuf *gdk_pixbuf_copy (const GdkPixbuf *pixbuf);
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/* Create a pixbuf which points to the pixels of another pixbuf */
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GdkPixbuf *gdk_pixbuf_new_subpixbuf (GdkPixbuf *src_pixbuf,
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int src_x,
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int src_y,
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int width,
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int height);
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/* Simple loading */
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#ifdef G_OS_WIN32
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/* DLL ABI stability hack. */
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#define gdk_pixbuf_new_from_file gdk_pixbuf_new_from_file_utf8
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#define gdk_pixbuf_new_from_file_at_size gdk_pixbuf_new_from_file_at_size_utf8
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#define gdk_pixbuf_new_from_file_at_scale gdk_pixbuf_new_from_file_at_scale_utf8
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#endif
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GdkPixbuf *gdk_pixbuf_new_from_file (const char *filename,
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GError **error);
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GdkPixbuf *gdk_pixbuf_new_from_file_at_size (const char *filename,
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int width,
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int height,
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GError **error);
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GdkPixbuf *gdk_pixbuf_new_from_file_at_scale (const char *filename,
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int width,
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int height,
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gboolean preserve_aspect_ratio,
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GError **error);
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GdkPixbuf *gdk_pixbuf_new_from_data (const guchar *data,
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GdkColorspace colorspace,
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gboolean has_alpha,
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int bits_per_sample,
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int width, int height,
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int rowstride,
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GdkPixbufDestroyNotify destroy_fn,
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gpointer destroy_fn_data);
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GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const char **data);
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GdkPixbuf* gdk_pixbuf_new_from_inline (gint data_length,
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const guint8 *data,
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gboolean copy_pixels,
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GError **error);
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/* Mutations */
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void gdk_pixbuf_fill (GdkPixbuf *pixbuf,
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guint32 pixel);
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/* Saving */
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#ifdef G_OS_WIN32
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/* DLL ABI stability hack. */
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#define gdk_pixbuf_save gdk_pixbuf_save_utf8
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#define gdk_pixbuf_savev gdk_pixbuf_savev_utf8
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#endif
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gboolean gdk_pixbuf_save (GdkPixbuf *pixbuf,
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const char *filename,
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const char *type,
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GError **error,
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...) G_GNUC_NULL_TERMINATED;
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gboolean gdk_pixbuf_savev (GdkPixbuf *pixbuf,
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const char *filename,
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const char *type,
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char **option_keys,
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char **option_values,
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GError **error);
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/* Saving to a callback function */
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typedef gboolean (*GdkPixbufSaveFunc) (const gchar *buf,
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gsize count,
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GError **error,
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gpointer data);
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gboolean gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
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GdkPixbufSaveFunc save_func,
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gpointer user_data,
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const char *type,
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GError **error,
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...) G_GNUC_NULL_TERMINATED;
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gboolean gdk_pixbuf_save_to_callbackv (GdkPixbuf *pixbuf,
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GdkPixbufSaveFunc save_func,
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gpointer user_data,
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const char *type,
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char **option_keys,
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char **option_values,
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GError **error);
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/* Saving into a newly allocated char array */
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gboolean gdk_pixbuf_save_to_buffer (GdkPixbuf *pixbuf,
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gchar **buffer,
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gsize *buffer_size,
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const char *type,
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GError **error,
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...) G_GNUC_NULL_TERMINATED;
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gboolean gdk_pixbuf_save_to_bufferv (GdkPixbuf *pixbuf,
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gchar **buffer,
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gsize *buffer_size,
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const char *type,
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char **option_keys,
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char **option_values,
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GError **error);
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/* Adding an alpha channel */
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GdkPixbuf *gdk_pixbuf_add_alpha (const GdkPixbuf *pixbuf, gboolean substitute_color,
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guchar r, guchar g, guchar b);
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/* Copy an area of a pixbuf onto another one */
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void gdk_pixbuf_copy_area (const GdkPixbuf *src_pixbuf,
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int src_x, int src_y,
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int width, int height,
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GdkPixbuf *dest_pixbuf,
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int dest_x, int dest_y);
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/* Brighten/darken and optionally make it pixelated-looking */
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void gdk_pixbuf_saturate_and_pixelate (const GdkPixbuf *src,
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GdkPixbuf *dest,
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gfloat saturation,
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gboolean pixelate);
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/* Transform an image to agree with its embedded orientation option / tag */
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GdkPixbuf *gdk_pixbuf_apply_embedded_orientation (GdkPixbuf *src);
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G_CONST_RETURN gchar * gdk_pixbuf_get_option (GdkPixbuf *pixbuf,
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const gchar *key);
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G_END_DECLS
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#endif /* GDK_PIXBUF_CORE_H */
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